American Radio Relay League (ARRL) - The American Radio Relay League (ARRL) is the largest membership association of Amateur Radio enthusiasts in the USA. The ARRL represents the interests of Amateur Radio operators before federal regulatory bodies, provides technical advice and assistance to Amateur Radio enthusiasts, supports a number of educational programs and sponsors emergency communications service throughout the country.

Repeater Directories & Scanner

Find repeaters, other clubs, hamfests, and scanner frequencies. Great links for traveling.

Amateur Repeater and Broadcast Websearch - This site will generate a list up of amateur repeaters and broadcast transmitters with in the specified miles from a specified city. Covers U.S. states, DC, and the 10 Canadian provinces.